Figure 6: Stroboscopic images of the ionic migration paths in MAPbI₃.

(a–f) Paths for the corresponding migration events in MAPbBr₃ are analogous. The colours of the frames go from blue (initial states) to green (intermediate states) to red (final states). (a,b) Migration path of I⁻ along the equatorial-to-equatorial and equatorial-to-axial channels, respectively. (c,d) Migration paths of MA⁺ along the equatorial and axial channels, respectively. (e,f) Migration paths of Pb²⁺ along the axial and equatorial channels. Both paths are rather complicated. The details are described in the main text.